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Title: light Post by: adelinetohyj on Jul 23, 2014 . A spaceship utilizes a large sail of highly reflective aluminium foil as an auxiliary
propulsion system. If the sail area is 1.6 km2 and is orientated for maximum efficiency in starlight of intensity 500 W/m2 and wavelength 550 × 10−9 m, the resulting acceleration of the ship of mass 1.2×105 kg would be about Title: Re: light Post by: bio_man on Aug 4, 2014 4.4×10^−5 m/s^2
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